>You speak of mastering your craft so you can become a great composer, which seems like a worthy goal, but is it really?
Every musician in history that was REALLY worth anything did so, and when it comes to art music you find virtually no exception. I myself can see the obvious pros of such a choice:
a) mastering the violins opens you all the available doors of the instrument: no piece is above you, and your improvisations are not hindered by technical limitations, rather you can improvise in the same way you compose.
b) mastering composition is needed not really to learn all the "rules", it is instead needed in order to learn how to think structurally about music, in a more comprehensive and all encompassing way.
There's no reason for me not to do it.
>You need motivation to maintain "crazy productivity"? An artist gets his drive from a desire to create, not (only?) because they want glory, but because they want to see their creation complete
I guess you've NEVER ever mastered a craft, you obviously don't know what you're talking about, nor you are able to even begin to imagine all of those tedious exercises that one has to do to complete his formal education.
>The one thing they desire the most is to realize their vision, their art.
That's why mastering crafts is hard: I could be improvising in 5 minutes from now, instead I'll have to do certain unmusical arpeggios and scalea for hours. Practicing your craft IS NOT fun, employing it is fun, but that's not what I'm asking motivation for.
>This combined with conscientiousness and intelligence might make you great.
Jesus Christ, just shut up.
Teach kids and adults and you will eventually eventually learn that some of them just don't get it: there is a thing called talent, but is something that hides itself behind the scenes: you don't really see it in the music itself, rather in how the musician practices and learn.
He did it for 7 years, only in his symphonies (his first sonata was already considered too daring by Haydn) then he broke free. Also I'd say that Beethoven is proof of the fact that hard work and being a child prodigy is not enough, and that even after all that work there is such a thing called talent.
Mozart is a bad example, considering how hard he practiced.
Good examples are Schubert, Schumann, Wagner and Berlioz. They all started composing late in their life (respectively 15yo, 21yo, 18yo and 19yo) and were all naturals. Schumann, for example, 2 years into his formal training was already composing faster than Mozart ever did.